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Montana Field Guide

Montana Field Guides

Douglas Bladderpod - Physaria douglasii
Other Names:  Lesquerella douglasii

Species of Concern

Global Rank: GNR
State Rank: S1
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank: 2
C-value:

External Links






State Rank Reason (see State Rank above)
Known from one population in northwest Montana at the edge of Lake Koocanusa. Impacts to the population from ORV use, recreation and erosion of the sandy bluffs are possible, though additional monitoring is needed to determine what impacts if any are occurring.
  • Details on Status Ranking and Review
    Douglas Bladderpod (Physaria douglasii) Conservation Status Review
    Review Date = 05/30/2012
    View State Conservation Rank Criteria
    Population Size

    Score3 - Vey Small: Generally <2,000 individuals.

    Range Extent

    Score3 - Local Endemic or Very Small Montana Range: Generally restricted to an area <10,000 sq. miles (equivalent to the combined area of Phillips and Valley Counties) or <6 Sub-basins (4th code watersheds) Range-wide OR limited to one Sub-basin in Montana

    Area of Occupancy

    Score3 - Very Low: Generally occurring in 3 or fewer Subwatersheds (6th Code HUC’s).

    Environmental Specificity

    Score2 - High: Species is restricted to a highly specialized and limited habitat and is typically dependent upon unaltered, high-quality habitat (C Values of 8-10).

    Trends

    ScoreNA - Rank factor not assessed.

    CommentMonitoring data are lacking to determine actual trends, though it seems likely that minor declines have occurred due to ORV use, erosion and development.

    Threats

    Score2 - High: 31-70% of the populations are being negatively impacted or are likely to be impacted by one or more activities or agents, which are expected to result in decreased populations and/or habitat quality and/or quantity.

    Intrinsic Vulnerability

    Score1 - Moderate Vulnerability: Specific biological attributes, unusual life history characteristics or limited reproductive potential makes the species susceptible to extirpation from stochastic events or other adverse impacts to its habitat and slow to recover.

    Raw Conservation Status Score

    Score 14 total points scored out of a possible 16 (Rarity factors and threats only).

 
General Description
Stems erect, 10–30 cm from a simple caudex. Basal leaves 2–9 cm long; the blade oblanceolate to obovate with entire to weakly dentate margins. Stem leaves numerous, narrowly oblanceolate, entire. Vestiture of 4- to 6-rayed sessile hairs. Petals 6–9 mm long. Fruit globose, inflated, 3–4 mm high style 3–4 mm long; seeds 2 to 4 per locule; pedicels ascending, straight to sigmoid, 6–20 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
BC, MT south to WA, OR. Known only from Lincoln County (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 6

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Sandy soils in open, ponderosa pine woodlands

Ecological Systems Associated with this Species

References
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Citation for data on this website:
Douglas Bladderpod — Physaria douglasii.  Montana Field Guide.  .  Retrieved on , from